I had the 'sleeve' done about two years ago and the two worst side effects were noticeably thinning hair and constipation.I lost 80 lbs in just a few months but then my appetite started increasing. I gained back 12lbs. My doctor gave me a trial box of Saxenda. I'm concerned about thyroid cancer, but haven't read anything about this 'side effect' in humans, only mice. Is hair loss a problem with Saxenda?